Add time:08/18/2019         Source:sciencedirect.com

Solubilized vat dyes wre separated by paper chromatography, using a methanolic solution of ammonia as solvent system. A system containing pyridine, isoamyl alcohol and ammonia, as well as a mixture of methanol and acetic acid were also used. Both descending and centrifugal chromatography were employed. The relation between dye constitution and chromatographic behaviour has been examined.

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